what the hell is a nug i keep hearin people say it but i dunno what it means. im good on most other words its just this one i got trouble with.
1 Improper use of contact lenses or steroid eyedrops can lead to fungal infections, which in turn can cause corneal ulcers. Also, a corneal injury that results in plant material getting into the eye can lead to fungal keratitis.  Acanthamoeba are microscopic, single-celled amoeba that can cause human infection.
Risk factors for the development of corneal ulcer include having had a prior corneal ulcer, failing to wear eye protection when using power tools or during welding, having extremely dry eyes, misusing contact lenses, failing to treat a red eye, exposure to UV light (snow blindness), and abnormalities of the eyelids or lashes.